package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对密码进行MD5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 添加员工信息
     *
     * @param employeeDTO
     * @return
     */
    @Transactional
    public void addEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置账号的锁定状态，默认1开启状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码，默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置添加员工的时间设置修改员工信息的时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());
        //设置创建人的id和创建人
        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        //添加进去
        employeeMapper.insertEmployee(employee);
    }

    /**
     * 员工分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开启分页
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        //从page里面拿到总记录数和员工信息集合
        long total = page.getTotal();
        List<Employee> employeeList = page.getResult();
        return new PageResult(total, employeeList);
    }

    /**
     * 启用或禁用员工
     *
     * @param status
     * @param id
     * @return
     */
    @Transactional
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();

        employeeMapper.updateEmployee(employee);
    }

    /**
     * 根据员工ID查询员工信息
     *
     * @param id
     * @return
     */
    @Override
    public Employee getEmployeeById(Long id) {
        Employee employee = employeeMapper.getEmployeeById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 修改员工信息
     *
     * @param employeeDTO
     * @return
     */
    @Transactional
    public void updateEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        //修改信息
        employeeMapper.updateEmployee(employee);
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     * @return
     */
    @Transactional
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        Long empId = BaseContext.getCurrentId();
        String oldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());

        Employee employee = employeeMapper.getEmployeeById(empId);
        if (!employee.getPassword().equals(oldPassword)) {
            throw new PasswordErrorException("原密码错误,修改失败");
        }
        Employee emp = new Employee();
        emp.setPassword(newPassword);
        emp.setId(employee.getId());
        employeeMapper.updateEmployee(emp);
    }
}
